Each to their own tactic i guess. The best way is experience and trial and error, no matter how many videos or guides you watch/read. For example i didn't find the doorway a 'deathtrap', maybe because i only retreated to it after a few minutes.

Radec's alright, just get a assault rifle, take cover and shoot. When he starts teleporting, walk one way and turn 360 degrees real fast so that you can see him, and then shoot him straight away.

I *bleep*ing beaten the game and saw the credits yet get NO *bleep*ing trophy for beating it!!!!!!!!Not only that trying to log online gave me a PSN sign is problem incurable until my PS3 froze going back to the XMB.

I actually don't like it, I'd be very much for GG allowing more controller customization as it just terrible for me. Can never get a handle for them. I mean left directional for knife? Really? idk if it's my alternative control layout but it's very annoying for myself.